Another round of GCC fixes (#3115)

* Fix remaining <string> -> <cstring> for GCC compilation (#3114 follow-up)

MWerks' <string> header transitively includes C string functions
(memcpy, strlen, strcmp, etc.), but GCC/Clang's <string> is the C++
std::string header. These files all use C string functions and should
include <cstring> instead.

* Use std::isnan instead of isnan for GCC compilation

GCC's <cmath> places isnan in the std namespace. Using the unqualified
isnan fails to compile with GCC/Clang.

* Fix cCcD_Src types: s32 -> u32 for bitmask fields

cCcD_SrcObjCommonBase::mSPrm, cCcD_SrcObjTg::mType, and
cCcD_SrcObjAt::mType are used as bitmasks (SetType/SetSPrm take u32,
MskType/MskSPrm use u32, values like 0xFFFFFFFF are common in
aggregate inits). Change from s32 to u32 to match usage.

Also fix AT_TYPE_WOLF_ATTACK/AT_TYPE_UNK to use unsigned literals,
and remove now-unnecessary (s32) casts on hex literals in collision
source data.

* Mark dummy() functions as static to avoid multiple definition errors

These decomp artifact functions have the same name and signature across
TUs, causing linker errors when building as a single binary.

include/JSystem/JAudio2/JASGadget.h

@@ -2,7 +2,7 @@
 #define JASGADGET_H
 
 #include "JSystem/JUtility/JUTAssert.h"
-#include <string>
+#include <cstring>
 
 #ifdef __MWERKS__
 #define JAS_GLOBAL_INSTANCE_INIT

include/JSystem/JUtility/JUTFont.h

@@ -2,7 +2,7 @@
 #define JUTFONT_H
 
 #include "JSystem/JUtility/TColor.h"
-#include <string>
+#include <cstring>
 
 /**
 * @ingroup jsystem-jutility

include/SSystem/SComponent/c_cc_d.h

@@ -62,8 +62,8 @@ enum cCcD_ObjAtType {
     /* 0x10000000 */ AT_TYPE_10000000 = (1 << 28),
     /* 0x10000000 */ AT_TYPE_20000000 = (1 << 29),
     /* 0x40000000 */ AT_TYPE_WOLF_CUT_TURN = (1 << 30),
-    /* 0x80000000 */ AT_TYPE_WOLF_ATTACK = (1 << 31),
-    /* 0xD8000000 */ AT_TYPE_UNK = 0xD8000000
+    /* 0x80000000 */ AT_TYPE_WOLF_ATTACK = (1u << 31),
+    /* 0xD8000000 */ AT_TYPE_UNK = 0xD8000000u
 };
 
 struct cCcD_SrcTriAttr {
@@ -120,16 +120,16 @@ public:
 STATIC_ASSERT(0x40 == sizeof(cCcD_DivideArea));
 
 struct cCcD_SrcObjCommonBase {
-    /* 0x0 */ s32 mSPrm;
+    /* 0x0 */ u32 mSPrm;
 };
 
 struct cCcD_SrcObjTg {
-    /* 0x0 */ s32 mType;
+    /* 0x0 */ u32 mType;
     /* 0x4 */ cCcD_SrcObjCommonBase mBase;
 };  // Size: 0x8
 
 struct cCcD_SrcObjAt {
-    /* 0x0 */ s32 mType;
+    /* 0x0 */ u32 mType;
     /* 0x4 */ u8 mAtp;
     /* 0x8 */ cCcD_SrcObjCommonBase mBase;
 };  // Size: 0xC

include/d/d_save.h

@@ -1,7 +1,7 @@
 #ifndef D_SAVE_D_SAVE_H
 #define D_SAVE_D_SAVE_H
 
-#include <string>
+#include <cstring>
 #include "SSystem/SComponent/c_xyz.h"
 #include <dolphin/os.h>
 #include "global.h"

include/f_ap/f_ap_game.h

@@ -6,7 +6,7 @@
 #include "JSystem/JFramework/JFWDisplay.h"
 #include "JSystem/JUtility/JUTAssert.h"
 #include "CaptureScreen.h"
-#include <string>
+#include <cstring>
 
 void fapGm_After();
 void fapGm_Create();

include/global.h

@@ -152,4 +152,9 @@ static const float INF = 2000000000.0f;
 #define FABSF std::fabsf
 #endif
 
+#ifndef __MWERKS__
+#include <cmath>
+using std::isnan;
+#endif
+
 #endif